28697746 has 32 divisors (see below), whose sum is σ = 53932032. Its totient is φ = 11126160.

The previous prime is 28697743. The next prime is 28697761. The reversal of 28697746 is 64779682.

It is a self number, because there is not a number n which added to its sum of digits gives 28697746.

It is not an unprimeable number, because it can be changed into a prime (28697743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46975 + ... + 47581.

It is an arithmetic number, because the mean of its divisors is an integer number (1685376).

It is a vampire number, since it can be written as 4298 ⋅ 6677 (with its own digits).

Almost surely, 2^28697746 is an apocalyptic number.

28697746 is a deficient number, since it is larger than the sum of its proper divisors (25234286).

28697746 is a wasteful number, since it uses less digits than its factorization.

28697746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its digits is 1016064, while the sum is 49.

The square root of 28697746 is about 5357.0277206675. The cubic root of 28697746 is about 306.1605733064.

The spelling of 28697746 in words is "twenty-eight million, six hundred ninety-seven thousand, seven hundred forty-six".